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Finding the Fourth Proportional to 170.66, 235.18 and 123.98

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Solution

The fourth proportional to 170.66, 235.18 and 123.98 is: 170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.66 : 235.18 = 123.98 : x
  2. Step 2: Convert to fraction form
    170.66/235.18 = 123.98/x
  3. Step 3: Cross multiply
    170.66x = 235.18 × 123.98
  4. Step 4: Simplify right side
    170.66x = 29,157.57
  5. Step 5: Solve for x
    x = 29,157.57/170.66
  6. Step 6: Final answer
    x = 170.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.